Got a chance to listen to the HE-6s at the recent ChiUniFi meet in Chicago. They were paired with a new Ray Samuels amp (due out in Dec) and the combo was nothing short of jaw dropping! Properly driven, the HE-6s had incredible presence and imaging. Standing there, eyes closed, I could place the intsruments and vocals in space around me and the sense of being immersed in the music was unlike any I have experienced. The sound was natural and effortless with excellent articulation, but no grain or harshness in the upper mid and treble areas -- something I find fatiguing in other headphones. At this same meet were hi-end Stax, Grado, Beyerdynamic and Sennheiser cans; yet the HE-6s stood out from them all. I highly recommend the HE-6s, particularly with the yet-to-be-released Ray Samuels amp, and this combo now tops my short list to complete my new home rig. Thanks, HiFiman for making these available!